Sales Ordes removes TAX at random for some or all prodcuts, even after creating it

Sales Ordes removes TAX at random for some or all prodcuts, even after creating it

Hi

at Zoho CRM, in the Sales Orders section, when Creating, Cloning or editing any Sales Orders the TAX of one or all products gets "unchecked" at random.

All of our products ALWAYS must have the same TAX selected automatically. At least it used to be like this.

This has become an issue for the past months, because we could be Cloning a Sales Order with several products, ALL of which have the ONLY TAX option selected ALWAYS, we Save it and proceed to "Export to PDF" and then we realize that the TAX got removed on some or all the products!!!

So we have to Edit the Order and do this again. 

there is no error messages, it just happens sometimes, but now we have to re-check every single Order before Exporting to PDF,  because it can happen when creating a new order, when cloning it, when editing